
X is the tenth studio album by Australian singer Kylie Minogue. It was released on 21 November 2007 by Parlophone. Work on the album began following Minogue's gradual recovery from breast cancer and subsequent radiotherapy treatment. The album introduced new American and European producers including Bloodshy & Avant, Guy Chambers, Calvin Harris and Freemasons. X received positive reviews from music critics. Many commended the production, Minogue's innovative writing and many believed that it was a true welcome back to the pop scene. However, upon release, some critics were divided whether the album was a 'comeback' album and some noted theme inconsistency. Commercially, X debuted at number one on the Australian Albums Chart, becoming her first number-one album since Fever (2001) and was certified platinum by the Australian Recording Industry Association (ARIA). In the United Kingdom, the album peaked at number four and was certified platinum by the British Phonographic Industry (BPI). Additionally, the album peaking inside the top 20 in other countries including Austria, Germany, Ireland, France, Scotland and Switzerland. "2 Hearts" was released as the lead single from X. The song peaked inside the top 10 in several countries including Australia and Spain, Italy, Sweden and the United Kingdom. "Wow" was released in Australia, Europe and the United States, while "In My Arms" was released in Europe. "All I See" and "The One" were released as digital singles, the first to promote the album in the United States and the latter released in Europe. X was promoted by the KylieX2008 concert tour where she travelled around Europe, Oceania, South America, Asia and South Africa. The album has sold over one million copies worldwide.